It's okay, but wish I purchased a different stone. The stone is too soft, therefore knife slowly cuts away the stone causing it to be unlevel. I am completely unable to keep it level, thus for me the stone became worthless. Feel the stone is cheaply made; I'd suggest buying a slightly more expensive whetstone. At end I had to trashed this stone and buy a new stone.
When attempting to choose a whetstone for sharpening your favorite knife, the number of choices can be mind boggling. In fact, sharpening stones are divided into four distinct categories consisting of natural whetstones and manufactured whetstones which, in turn, are divided into two other categories consisting of oil stones and water stones. Then, there are numerous different varieties of natural whetstones consisting of several different materials that are quarried from different places around the world as well as several different types of man-made whetstones!
Grinding is generally done with some type of sharpening stone. Sharpening stones come in coarse and fine grits and can be described as hard or soft based on whether the grit comes free of the stone with use. Many sources of naturally occurring stones exist around the world; some types known to the ancient world are no longer used, due to exhaustion of former resources or the ready availability of superior alternatives. Arkansas, USA is one source for honing stones, which are traditionally used with water or honing oil. India is another traditional source for stones. Ceramic hones are also common, especially for fine grit size. Japanese water stones (both artificial and natural) come in very fine grits. Before use, they are soaked in water, then flushed with water occasionally to expose new stone material to the knife blade. The mixture of water and abraded stone and knife material is known as slurry, which can assist with the polishing of the knife edge and help sharpen the blade. Generally, these are more costly than oilstones. Coated hones, which have an abrasive, sometimes diamonds, on a base of plastic or metal, are also available.
Last, it should be noted that dual-sided Coticule/Belgian Blue whetstones are also sometimes available which have a layer of Belgian Blue stone on one side and a layer of Coticule on the other. Thus, these whetstones provide a softer, more coarse, grit on one side and a harder, finer, grit on the other. Plus, due to the inherent toughness of the Belgian Blue stone, these dual-sided stones do not require a substrate layer.
Visually, a very sharp knife has an edge that is too small to see with the eye; it may even be hard or impossible to focus in a microscope. The shape near the edge can be highlighted by rotating the knife and watching changes in reflection. Nicks and rolled edges can also be seen, as the rolled edge provides a reflective surface, while a properly straightened edge will be invisible when viewed head-on.
One of the most well-regarded natural whetstones is the yellow-gray "Belgian Coticule", which has been legendary for the edge it can give to blades since Roman times, and has been quarried for centuries from the Ardennes. The slightly coarser and more plentiful "Belgian Blue" whetstone is found naturally with the yellow coticule in adjacent strata; hence two-sided whetstones are available, with a naturally occurring seam between the yellow and blue layers. These are highly prized for their natural elegance and beauty, and for providing both a fast-cutting surface for establishing a bevel and a finer surface for refining it. This stone is considered one of the finest for sharpening straight razors.[citation needed]

This article is not about how to sharpen a knife, check this article instead, but briefly, a coarse stone is critical, it has the potential to raise a Burr quickly and make a dull knife sharp quickly. The correct use of pressure enables us to form a burr, remove the burr and then do some coarse stone refinement and thus create a very sharp knife. This sensation is motivation, it is a confidence builder and will enhance your sharpening experience, so believe me when I say that a coarse stone is your first priority. I recommend a 400, 600 or 800 grit. After that, depending on the knives you are sharpening strive to obtain stone combination, such as a 400 – 1,000 – 5,000 grit three stone combination is going to allow you to achieve knives sharper than most people have ever seen.

Also natural stones have a random grit size that gives a long lasting edge. Basically the random grits create varying sizes of micro-serration in the blade that wear down at a different rate, therefore longer edge retention. Whether this is true or not we really like natural stone, especially for sharpening tradition single bevel Japanese knives. Use natural stones with water – it’s far cheaper than sake.
Honing steels are another story altogether. Honing steels are those instruments that look light a saber (light or otherwise) which you use to gussy up the edge of the blade periodically before using it. These do wear out every few years or less, depending on how often you use them. If you are unsure whether your honing steel is worn out run your finger around it. If it feels smooth all the way around then it’s time for a replacement. Not to worry though, they’re really affordable. One thing you may want to keep in mind about honing steels is that they typically won’t do much to hone the edge of some super hard knives, such as Japanese Global brand knives.

Start off on the rough grit side of the stone. Check the grit on your stone, or the packaging that came with the stone, to identify which is which. In general, whetstones and diamond stones each have different grits on either side. The rough grit side is used to grind the steel down, while the fine grit side is used to sharpen or hone the knife. The grinding process comes first, so you start on the rough grit side.
I recommend keeping two stones in your kit. One with a medium grit (around 800 or so) to perform major sharpening jobs, and one with a fine grit (at least 2,000) to tune the edge to a razor-sharp finish. For real pros, a stone with an ultra-fine grit (8,000 and above) will leave a mirror-like finish on your blade, but most cooks won't notice the difference in terms of cutting ability.
A: Experienced professionals know exactly how sharp they want their knives to be and have an instinctive feel for when they’re just right and when they’re even a tiny bit off. Most folks, however, need to have some sort of objective test they can use to determine if in fact their best knife has been properly sharpened. There are a few simple ones you can use:
To take off the fine scratches and burrs left by coarser stones, and to polish the surface, you can use stones starting at around 2000 grit. There is theoretically no upper limit, but stones above about 10000 grit achieve practically no measurable improvement in the edge. It is also interesting to note that above 8000 grit, there is no Japanese measurement standard. For stones labelled as having a finer grit, you simply have to take the manufacturer's word for it.